<!--
 * @Description: 多标签页模式下，右键点击标签页，显示选项的组件
 * @Author: youzi
 * @Date: 2019-07-18 11:26
 * @LastEditTime: 2019-07-31 15:37
 * @LastEditors: Please set LastEditors
 -->
<template>
  <a-menu :style="style" class="contextmenu" v-show="visible" @click="handleClick" :selectedKeys="selectedKeys">
    <a-menu-item :key="item.key" v-for="item in itemList">
      <a-icon role="menuitemicon" v-if="item.icon" :type="item.icon" />{{ item.text }}
    </a-menu-item>
  </a-menu>
</template>

<script>
export default {
  name: 'Contextmenu',
  props: {
    visible: {
      type: Boolean,
      required: false,
      default: false
    },
    itemList: {
      type: Array,
      required: true,
      default: () => []
    }
  },
  data() {
    return {
      left: 0,
      top: 0,
      target: null,
      selectedKeys: []
    };
  },
  computed: {
    style() {
      return {
        left: this.left + 'px',
        top: this.top + 'px'
      };
    }
  },
  created() {
    window.addEventListener('mousedown', e => this.closeMenu(e));
    window.addEventListener('contextmenu', e => this.setPosition(e));
  },
  methods: {
    closeMenu(e) {
      if (['menuitemicon', 'menuitem'].indexOf(e.target.getAttribute('role')) < 0) {
        this.$emit('update:visible', false);
      }
    },
    setPosition(e) {
      this.left = e.clientX;
      this.top = e.clientY;
      this.target = e.target;
    },
    handleClick({ key }) {
      this.$emit('select', key, this.target);
      this.$emit('update:visible', false);
    }
  }
};
</script>

<style lang="less" scoped>
.contextmenu {
  position: fixed;
  z-index: 2;
  border: 1px solid #eee;
  border-radius: 4px;
  box-shadow: 2px 2px 5px #e8e8e8 !important;
}
</style>
